EP2240702B1 - Waschmaschine - Google Patents

Waschmaschine Download PDF

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Publication number
EP2240702B1
EP2240702B1 EP08871090A EP08871090A EP2240702B1 EP 2240702 B1 EP2240702 B1 EP 2240702B1 EP 08871090 A EP08871090 A EP 08871090A EP 08871090 A EP08871090 A EP 08871090A EP 2240702 B1 EP2240702 B1 EP 2240702B1
Authority
EP
European Patent Office
Prior art keywords
support
end portion
bearings
tank
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08871090A
Other languages
English (en)
French (fr)
Other versions
EP2240702A1 (de
Inventor
Stefano Mancini
Stefano Bacelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meccanica Generale SRL
Original Assignee
Meccanica Generale SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meccanica Generale SRL filed Critical Meccanica Generale SRL
Priority to PL08871090T priority Critical patent/PL2240702T3/pl
Publication of EP2240702A1 publication Critical patent/EP2240702A1/de
Application granted granted Critical
Publication of EP2240702B1 publication Critical patent/EP2240702B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
    • B21D53/12—Making other particular articles parts of bearings; sleeves; valve seats or the like cages for bearings
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2340/00—Apparatus for treating textiles

Definitions

  • the present patent application for industrial invention relates to a washing machine comprising a bearing support made of moulded sheet metal.
  • the said bearing support is preferably designed to be mounted in washing machines and washer/dryer combos to replace similar parts that are used currently.
  • the first component consists in a large hollow cylindrical body (1) closed at one end by a bottom wall (10) with a central hole connected in the back with a cylindrical nozzle (11) designed to exactly house a metal bearing support (50) with basically cylindrical shape.
  • the second component consists in a flange (2) with a large central opening (20a) designed to be mounted at the front open end of the hollow cylindrical body (1).
  • a cylindrical drum (3) is normally mounted inside the tank and designed to be loaded with laundry through the said opening (20a) of the front flange (2) of the tank.
  • the drum (3) is closed on the back by a bottom wall (30) with an axially protruding shaft (31) in central position designed to be driven into rotation by the electrical motor of the household appliance that is usually mounted outside the tank.
  • the shaft (31) is designed to be inserted and supported, with the interposition of two ball bearings (4, 40) with different diameters, in the bearing support (50) engaged into the nozzle (11) obtained on the bottom wall (10) of the hollow cylindrical body (1) of the tank.
  • a similar basically cylindrical bearing support (50) is internally provided with two circular housings in which the two ball bearings (4, 40) are exactly engaged.
  • a similar bearing support (50) needs to be anchored firmly to the plastic structure of the nozzle (11) that houses it.
  • current bearing supports have an external geometrical shape that tends to favour the penetration of the plastic material used to mould the bottom wall of the tank.
  • the said stable anchoring is necessary because the laundry loaded in the drum of a washing machine tends to have a random arrangement due to the rotational motion of the drum.
  • figure 3 is a sectional view of a traditional bearing support obtained from aluminium or cast iron. As shown in the said figure, a similar support must have a longitudinal section of variable thickness according to its typical operative requirements.
  • the said support must be internally provided with at least two perimeter shoulders (50a, 50b) designed to stop the bearings engaged in the end housings and externally provided with at least a perimeter flange (60) designed to favour anchoring on the plastic material used for the nozzle (11) of the hollow body (1) where the support (50) is to be engaged firmly.
  • the said internal shoulders (50a, 50b) and the external flange (60) can only be obtained by means of a higher deposit of the material inside the die used to mould the support (50).
  • EP 1 211 431 discloses a metal bearing liner for an axial flow fan motor.
  • the metal bearing liner is formed by press work over a progressive sheet material in sequence.
  • GB 1 275 237 discloses a bearing unit for washing machine.
  • the bearing housing is in the form of a deep-drawn sheet metal part.
  • the specific purpose of the present invention is to devise a washing machine wherein the manufacturing technology of bearing supports is characterised by a simpler, quicker procedure compared to traditional technologies.
  • Another purpose of the present invention is to obtain a washing machine having bearing supports with constant thickness, regardless of the presence of the necessary internal and external ridges.
  • a bearing support of washing machine is moulded by means of a deep-drawing process with multiple operations, starting from a flat sheet metal and obtaining housings for ball bearings with excellent dimensional accuracy and surface finish.
  • the said housings for ball bearings are obtained by means of cold pressure forming with special calibrated punches.
  • a first important advantage of the present invention is that the complete bearing support is obtained without requiring the additional machining operations (in particular: turning and grinding) that are inevitable in case of aluminium or cast iron supports.
  • a second important advantage of this pressure forming technique is that the support is given a constant (or basically constant) thickness along its entire height, thus considerably reducing the amount of material used and the weight of the finished product.
  • the bearing support (500) of washing machine obtained according to the aforementioned innovative technique has a basically cylindrical structure, externally provided with perimeter means for anchoring to the plastic material in which the support (500) is to be drawn and internally provided with perimeter stop means for bearings (4, 40).
  • the support (500) is provided with a first end (500a) with higher section and a second end (500b) with lower section, with the interposition of a central connection section (500c).
  • Two calibrated circular housings (501, 502) are obtained at the ends (500a, 500b) of the support (500), designed to exactly house corresponding ball bearings (4, 40) with different diameters.
  • the support of the invention (500) has a basically constant thickness both in its straight sections (i.e. parallel to its longitudinal axis) and in the curved sections with inward or outward direction.
  • the thickness value is determined by the resistance requirements against mechanical stress of the housing (501) designed to house the bearing (4) facing the drum, that is to say the housing that is actually the most stressed section of the entire structure of the support of the invention (500).
  • the embodiment of the present invention shown in fig. 4 is provided at the first end (500a) with a perimeter flange (600) designed to favour the stable anchoring of the support (500) in the plastic material used to mould the bottom wall (10) of the tank.
  • a similar cylindrical support (500) is obtained from a flat sheet metal (as shown in fig. 9A ) formed by deep-drawing according to a precise sequence of operations.
  • the first operation (I) of the sequence consists in forming the flat sheet metal (LP) to obtain the cylindrical structure of the support (500) complete with perimeter flange (600), as shown in fig. 9B .
  • the presence of a similar flange (600) contributes to give higher rigidity to the housing (501) of the bearing, while on the other hand ensures the firm anchoring of the support (500) in the plastic material of the bottom wall (10) of the tank, especially when the drum is spinning.
  • the support (500) is moulded by means of successive deformations of the flat sheet metal during suitable deep-drawing phases.
  • the circular housings (501, 502) designed to receive the ball bearings (4, 40) are outlined basically at the ends (500a, 500b) of the support (500).
  • the next operation consists in "machining" the perimeter flange (600), meaning perimeter fringing (material removal), perimeter drilling and backward folding of the external border; reference is made to figure 9C .
  • the flange (600) is folded backwards and provided with an external crenellated border (601) and a perimeter series of through holes (602). Considering that the aforementioned forming operations generate a large amount of heat, the next operation consists in cooling the moulded support (500).
  • the final operation of the said process consists in cold pressure forming with calibrated punches (P1 P2) of the two housings (501, 502) in order to receive bearings (4, 40) with the established tolerance values; reference is made to figure 9D .
  • the support (500) is firmly held by a sort of vice (M).
  • the technology of the invention can be used to obtain a bearing support provided with a perimeter stiffening border (700) folded outwards at the second end (500b), in addition to the flange (600) at the first end (500a); reference is made to figure 7 .
  • a perimeter flange (800) could also be realised in the intermediate section (500c) of the support (500), especially with reference to application on washing machines with low rotational speed and lower centrifugal force; reference is made to figure 8 .
  • the one or more perimeter flanges may also have different profiles from the ones shown in the aforementioned figures.
  • the flange (900) provided in the embodiment of fig. 6 has a basically flat profile (that is to say without external backwards folded border) and is not provided with through holes, which are replaced by non-through niches (901) that originate a basically "indented” structure to favour the stable anchoring with the plastic material of the bottom wall (10) of the tank (1).
  • alternative solutions may be also provided with reference to the structure given to the perimeter stop for bearings (4, 40) inside the corresponding housings (501, 502).
  • a similar stop can consist in a shoulder (500d) with continuous development along the entire circumference of the housing (502), as shown in figs. 4 , 5 and 8 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Sliding-Contact Bearings (AREA)
  • Replacement Of Web Rolls (AREA)
  • Centrifugal Separators (AREA)

Claims (1)

  1. Waschmaschine umfassend:
    - eine Kunststoffwanne, gebildet aus einem großen, zylindrisch geformten Hohlkörper(1) und einem Flansch (2), wobei der zylindrisch geformte Körper an einem Ende durch eine Bodenwand (10) mit einem zentralen Loch begrenzt wird, das auf der Rückseite an ein zylindrisches Mundstück (11) angeschlossen ist,
    - eine zylindrisch geformte Trommel (3), die in der Wanne montiert ist und auf der Rückseite durch eine Bodenwand (30) mit einer Welle (31) begrenzt wird, die in zentraler Position axial übersteht und dazu bestimmt ist, von einem Elektromotor in Rotation versetzt zu werden,
    - eine Halterung für Lagergehäuse (500), die in das Mundstück (11) der Wanne eingreift und die Welle (31) der Trommel mithilfe von zwei Lagern (4, 40) auf drehbare Weise trägt,
    wobei die Halterung für Lagergehäuse (500) vollständig mittels Tiefziehen aus einem flachen Blech (LP) hergestellt wird, um eine im Wesentlichen zylindrisch geformte Struktur mit gleichmäßiger Dicke zu erhalten,
    wobei die Halterung für Lagergehäuse (500) Folgendes umfasst:
    - ein erstes Ende (500a) und ein zweites Ende (500b) mit entsprechenden Sitzen (501, 502) zur Aufnahme der beiden Lager (4, 40) und Ausbildung umlaufender Anschläge (500d, 500e) für die beiden Lager (4, 40) in den Sitzen (501, 502) und
    - einen umlaufenden Flansch (600), der auf dem Rand des ersten Endes (500a) für das Eingreifen der Halterung (500) in das Mundstück (11) der Wanne herausgearbeitet ist,
    dadurch gekennzeichnet, dass
    - die beiden Lager (4, 40) Kugellager mit unterschiedlichen Durchmessern sind, wobei das erste Kugellager (4) einen größeren Durchmesser als das zweite Kugellager (40) besitzt,
    - das erste Ende (500a) der Halterung (500) einen größeren Querschnitt als das zweite Ende (500b) aufweist, damit das erste Kugellager (4) in dem Sitz (501) des ersten Endes (500a) und das zweite Kugellager (40) in dem Sitz (502) des zweiten Endes (500b) aufgenommen werden kann,
    - die Halterung (500) in das Kunststoffmaterial des Mundstücks (11) der Wanne versenkt ist und
    der umlaufende Flansch (600) der Halterung nach hinten gebogen und mit einem äußeren gezackten Rand (601) versehen ist, der durch Entfernen von Material geschaffen wird, um eine feste Verankerung in der Kunststoffstruktur des Mundstücks (11) zu erzielen.
EP08871090A 2008-01-16 2008-11-18 Waschmaschine Not-in-force EP2240702B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08871090T PL2240702T3 (pl) 2008-01-16 2008-11-18 Pralka mechaniczna

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000007A ITMC20080007A1 (it) 2008-01-16 2008-01-16 Metodo per la realizzazione di un supporto portacuscinetti in lamiera stampata.
PCT/EP2008/065728 WO2009089949A1 (en) 2008-01-16 2008-11-18 Manufacturing method of a bearing support made of moulded sheet metal.

Publications (2)

Publication Number Publication Date
EP2240702A1 EP2240702A1 (de) 2010-10-20
EP2240702B1 true EP2240702B1 (de) 2011-11-02

Family

ID=40227800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08871090A Not-in-force EP2240702B1 (de) 2008-01-16 2008-11-18 Waschmaschine

Country Status (6)

Country Link
EP (1) EP2240702B1 (de)
AT (1) ATE531960T1 (de)
IT (1) ITMC20080007A1 (de)
PL (1) PL2240702T3 (de)
RU (1) RU2470103C2 (de)
WO (1) WO2009089949A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2393097B1 (es) * 2010-12-06 2013-11-22 BSH Electrodomésticos España S.A. Cubo de rodamientos para máquina lavadora.
TR202017754A2 (tr) 2020-11-06 2022-05-23 Arcelik As Yatak montaj düzeneği̇ i̇çeren bi̇r çamaşir maki̇nesi̇

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7004815U (de) 1970-02-12 1970-06-11 Skf Kugellagerfabriken Gmbh Lagerungseinheit.
SU1745788A1 (ru) * 1990-10-01 1992-07-07 Научно-производственное объединение "Марс" Стирально-отжимна машина
KR200145371Y1 (ko) * 1996-05-30 1999-06-15 윤종용 드럼세탁기의 밸런싱장치
JP4461311B2 (ja) 2000-11-22 2010-05-12 ミネベア株式会社 軸流ファンモータ
ES2242470B1 (es) * 2002-11-06 2007-02-01 Bsh Electrodomesticos España, S.A. Cuba de plastico para lavadoras domesticas.
PL1528136T3 (pl) * 2003-10-29 2011-04-29 Miele & Cie Agregat piorący dla pralki ze zbiornikiem z tworzywa sztucznego

Also Published As

Publication number Publication date
PL2240702T3 (pl) 2012-03-30
WO2009089949A1 (en) 2009-07-23
RU2010133962A (ru) 2012-02-27
RU2470103C2 (ru) 2012-12-20
ITMC20080007A1 (it) 2009-07-17
EP2240702A1 (de) 2010-10-20
ATE531960T1 (de) 2011-11-15

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